Energy transfer between two kinds of J-aggregates studied by near-field absorption-fluorescence spectroscopy

Fukutake, Naoki; Takasaka, Shigehiro; Kobayashi, Takayoshi

doi:10.1016/s0009-2614(02)00882-5

Cited by 16 publications

(22 citation statements)

References 23 publications

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“…18,19,20,21,22,23,24,34 We have focused, however, on two other aspects specific to multichromophoric systems, namely the effects of band mixing and intraband relaxation on the energy transfer. The first has been studied by comparison of the perturbative and the nonperterbative method.…”

Section: Discussionmentioning

confidence: 99%

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Excitation Energy Transfer between Closely Spaced Multichromophoric Systems: Effects of Band Mixing and Intraband Relaxation

2006

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We theoretically analyze the excitation energy transfer between two closely spaced linear molecular J-aggregates, whose excited states are Frenkel excitons. The aggregate with the higher (lower) exciton band edge energy is considered as the donor (acceptor). The celebrated theory of Förster resonance energy transfer (FRET), which relates the transfer rate to the overlap integral of optical spectra, fails in this situation. We point out that in addition to the well-known fact that the pointdipole approximation breaks down (enabling energy transfer between optically forbidden states), also the perturbative treatment of the electronic interactions between donor and acceptor system, which underlies the Förster approach, in general loses its validity due to overlap of the exciton bands. We therefore propose a nonperturbative method, in which donor and acceptor bands are mixed and the energy transfer is described in terms of a phonon-assisted energy relaxation process between the two new (renormalized) bands. The validity of the conventional perturbative approach is investigated by comparing to the nonperturbative one; in general this validity improves for lower temperature and larger distances (weaker interactions) between the aggregates. We also demonstrate that the interference between intraband relaxation and energy transfer renders the proper definition of the transfer rate and its evaluation from experiment a complicated issue, which involves the initial excitation condition.

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Section: Discussionmentioning

confidence: 99%

“…20,21,22,23,24,34 We note that in Refs. 18 and 19 the problem was treated in a more general way than we did above: only the transfer interactions J DA nm were considered as perturbations, while the exciton-bath couplings were accounted for by a selfconsistent second-order evaluation of the self-energy.…”

Section: Perturbative Approachmentioning

confidence: 98%

Excitation Energy Transfer between Closely Spaced Multichromophoric Systems: Effects of Band Mixing and Intraband Relaxation

2006

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“…One of the main properties of the J -aggregates is the absorption spectrum: Light absorption by chromophores, which form J -aggregates, is characterized by a sharp spectral band of relatively high molar absorption coefficients and at significantly lower energies than the absorption associated with the transitions of individual (nonaggregated) dye cations [1,9]. Other properties include those having been observed for J -aggregates in general, such as fluorescence [10], spectral-hole burning phenomena [11], nonlinear optical properties [12,13] and energy transfer [14,15].…”

Section: Introductionmentioning

confidence: 99%

Spectral properties and structure of the J-aggregates of pseudoisocyanine dye in layered silicate films

Bujdák

Iyi

2008

Journal of Colloid and Interface Science

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“…Jaggregates exhibit a very narrow and red-shifted electronic absorption band (J band) and strong fluorescence with a small Stokes shift. These characteristic optical properties, which are the origins of their expected functions, are explained by the interaction between the transition dipole moments [26,27]. However, while organic semiconductors have obvious advantages, due to simple fabrication and high performance, the main draw-backs are a slow-optical response, lack of thermal/mechanical durability, and most importantly limited life span.…”

Section: Naturally Self-assembled Nanosystemsmentioning

confidence: 99%

Naturally Self-Assembled Nanosystems and Their Templated Structures for Photonic Applications

Kannan

Kotla

Ahmad

et al. 2013

Journal of Nanoparticles

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Self-assembly has the advantage of fabricating structures of complex functionalities, from molecular levels to as big as macroscopic levels. Natural self-assembly involves self-aggregation of one or more materials (organic and/or inorganic) into desired structures while templated self-assembly involves interstitial space filling of diverse nature entities into self-assembled ordered/disordered templates (both from molecular to macro levels). These artificial and engineered new-generation materials offer many advantages over their individual counterparts. This paper reviews and explores the advantages of such naturally self-assembled hybrid molecular level systems and template-assisted macro-/microstructures targeting simple and low-cost device-oriented fabrication techniques, structural flexibility, and a wide range of photonic applications.

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Energy transfer between two kinds of J-aggregates studied by near-field absorption-fluorescence spectroscopy

Cited by 16 publications

References 23 publications

Excitation Energy Transfer between Closely Spaced Multichromophoric Systems: Effects of Band Mixing and Intraband Relaxation

Excitation Energy Transfer between Closely Spaced Multichromophoric Systems: Effects of Band Mixing and Intraband Relaxation

Spectral properties and structure of the J-aggregates of pseudoisocyanine dye in layered silicate films

Naturally Self-Assembled Nanosystems and Their Templated Structures for Photonic Applications

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